Open Access. Powered by Scholars. Published by Universities.®

Digital Commons Network™

Open Access. Powered by Scholars. Published by Universities.®

University of Mississippi

Discipline
Keyword
Publication Year
Publication
Publication Type
File Type

Articles 1531 - 1560 of 8910

Full-Text Articles in Entire DC Network

Manifoldlike Causal Sets, Miremad Aghili Jan 2019

Manifoldlike Causal Sets, Miremad Aghili

Electronic Theses and Dissertations

The content of this dissertation is written in a way to answer the important question of manifold likeness of causal sets. This problem has importance in the sense that in the continuum limit and in the case one finds a formalism for the sum over histories, the result requires to be embeddable in a manifold to be able to reproduce General Relativity. In what follows I will use the distribution of path length in a causal set to assign a measure for manifold likeness of causal sets to eliminate the dominance of nonmanifold like causal sets. The distribution of interval …

Go to article

Feedback In The Flipped High School Stem Classroom, Trisha Michele Gilbreath Jan 2019

Feedback In The Flipped High School Stem Classroom, Trisha Michele Gilbreath

Electronic Theses and Dissertations

This study examined how much feedback students received in the flipped high school science, technology, engineering and math (STEM) classroom. The flipped classroom is a pedagogical technique where students watch video instruction at home and complete collaborative activities in class. This technique has gained popularity in recent years, especially in STEM classrooms. The literature on the flipped classroom is inconclusive, with studies mainly conducted in higher education. Student and instructor perceptions were often studied, and those perceptions are generally positive about the flipped classroom, though there are concerns to consider. Student performance shows that the flipped classroom is at least …

Go to article

Ligand Effect On Gold Nanomolecules Demonstrated Using Aliphatic, Aromatic And Bulky Thiolate Ligands, Milan Rambukwella Jan 2019

Ligand Effect On Gold Nanomolecules Demonstrated Using Aliphatic, Aromatic And Bulky Thiolate Ligands, Milan Rambukwella

Electronic Theses and Dissertations

Atomically precise thiolate protected gold nanoparticles (AuNPs) known as gold nanomolecules (AuNMs) are intensely pursued owing to their feasibility to elucidate their structure by single crystal X-ray crystallography. They have distinct number of Au atoms (n) and thiolate (-SR, R-hydrocarbon chain) ligands (m) with molecular formula of the form [Aun(SR)m]. AuNMs are made of a gold core protected by a thiolate-monolayer and possess size-dependent properties conferred by quantum confinement. Atomic precision has been achieved in the 1-3 nm range and crystal structures of several AuNMs ranging from 18 to 279gold atoms have been studied. They provide significant insights into the …

Go to article

Towards Misleading Connection Mining, Md Main Uddin Rony Jan 2019

Towards Misleading Connection Mining, Md Main Uddin Rony

Electronic Theses and Dissertations

This study introduces a new Natural Language Generation (NLG) task – Unit Claim Identification. The task aims to extract every piece of verifiable information from a headline. The Unit Claim identification has applications in other domains; such as fact-checking where the identification of each verifiable information from a check-worthy statement can lead to an effective fact-check. Moreover, the extracting of the unit claims from headlines can identify a misleading news article, by mapping evidence from contents. For addressing the unit claim identification problem, we outlined a set of guidelines for data annotation, arranged in-house training for the annotators and obtained …

Go to article

Cheminformatic Approach For Deconvolution Of Active Compounds In A Complex Mixture - Phytoserms In Licorice, Manal Mohammad Alhusban Jan 2019

Cheminformatic Approach For Deconvolution Of Active Compounds In A Complex Mixture - Phytoserms In Licorice, Manal Mohammad Alhusban

Electronic Theses and Dissertations

ABSTRACT After the validation of our in silico models by using the previous knowledge in this area the alerting phytochemicals from two Glycyrrhiza species (G. glabra and G. uralensis) were clustered. Exhaustive computational mining of licorice metabolome against selected endocrinal and metabolic targets led to the discovery of a unique class of compounds which belong to the dihydrostilbenoids (DHS) class appended with prenyl groups at various positions. To the best of our knowledge this interesting group of compounds has not been studied for their estrogenic activities or PXR activation. In addition some of the bis-prenylated DHS have been reported to …

Go to article

Probing Atypical Noncovalent Interactions Using Electronic Structure Theory, Katelyn Mae Dreux Jan 2019

Probing Atypical Noncovalent Interactions Using Electronic Structure Theory, Katelyn Mae Dreux

Electronic Theses and Dissertations

Some of the most important topics in modern chemistry involve noncovalent interactions in a variety of ways, from pharmacological processes to materials design. Due to the comparatively weak nature of these interactions, they can be difficult to investigate experimentally. Beyond what might be considered the ‘typical’ noncovalent interactions such as hydrogen bonding or London dispersion, there are less well known noncovalent interactions such as coordinate covalent, dihydrogen, and nonconventional hydrogen bonding, which have been the focus of much of this research. Through the use of electronic structure theory, fundamental information about the structure, energetics, and molecular properties of noncovalently bound …

Go to article

Use Of Seismic Refraction In Determining Rock Mass Anisotropy, Mohammad Najmush Sakib Oyan Jan 2019

Use Of Seismic Refraction In Determining Rock Mass Anisotropy, Mohammad Najmush Sakib Oyan

Electronic Theses and Dissertations

Seismic refraction is a popular method used by geological/geotechnical engineers to understand subsurface conditions. This method along with information collected from borings produce a realistic image of the ground beneath us. The goal of this study is to define and test a set of procedures to use seismic refraction alone to create high quality images of subsurface conditions. The focus is on areas with several meters of soil overlain by bedrock. The application of these procedures will minimize construction costs by eliminating the need for multiple boreholes. The results show that two important criteria must be met for successful application …

Go to article

Characterization Of Hydrogen Bonding, Halogen Bonding And Argyrophilic Interactions Using Computational Modeling, Sarah Nicole Arradondo Jan 2019

Characterization Of Hydrogen Bonding, Halogen Bonding And Argyrophilic Interactions Using Computational Modeling, Sarah Nicole Arradondo

Electronic Theses and Dissertations

Non-covalent interactions govern multiple important chemical processes throughout nature from those within the human body to the complex environment of the atmosphere. Quantum mechanical electronic structure modeling of these relatively weak interactions can provide molecular level insight that can further our understanding of specific macroscopic properties. In the present work different non-covalent interactions are computationally evaluated within four systems. A small prototypical hydrogen bonded system and the various structural motifs that promoted proton transfer within concentrated acid and water clusters are characterized with sophisticated wavefunction based methods and large robust basis sets in order to accurately predict the structures energies …

Go to article

Twin Text In The Secondary Social Studies And English Classroom, Sarah Booth Quong Jan 2019

Twin Text In The Secondary Social Studies And English Classroom, Sarah Booth Quong

Electronic Theses and Dissertations

This mixed-method study explores the implementation of Twin Text and its effectiveness in the U.S. History and English classrooms with regard to: mastery of the objectives laid out within the course curriculum, perpetuation of deeper learning, and fostering empathy and civic engagement through the use of Twin Text involving tenth and eleventh grade students and United States History and English teachers. The study answers the following questions: (1) What are the experiences of students in a Twin Text setting classroom environment? Three sub questions emerged: (A) In what ways does cross-curriculum teaching with an English Language Arts instructor affect student …

Go to article

Theranostics Based On Linear Dendritic Block Copolymers, Jon Williams Jan 2019

Theranostics Based On Linear Dendritic Block Copolymers, Jon Williams

Electronic Theses and Dissertations

When combining imaging and therapeutic motifs, known as theranostics, amphiphilic diblock copolymers have a strong precedent of success. These polymers can self-assemble into a variety of morphologies that are known to concentrate in areas of inflammation such as tumors. However, prediction of size and morphology from polymer structure still remains an open challenge. Another system with promise of therapeutic efficacy are tree-like struc- tures known as dendrimers, such as poly(amidoamine) (PAMAM) and bis-(hydroxymethyl) propionic acid (bMPA), which can uptake drugs and dyes into their branches. It is desireable to combine these two motifs, using linear-dendritic block copolymers (LDBCs). These represent …

Go to article

Cultural Influences On Body Size Ideals Among African American Women In The Mississippi Delta, Lois Marie Coleman Jan 2019

Cultural Influences On Body Size Ideals Among African American Women In The Mississippi Delta, Lois Marie Coleman

Electronic Theses and Dissertations

Results: One-on-one interviews yielded 25 cognitive maps. The maps contained a total of 169 concepts with 294 connections among them. The lowest number of variables identified on a participant’s map was 4 and the highest was 11. The lowest number of connections made on a participant’s map was 4 and the highest was 39. Through qualitative condensing and matrix addition, the 169 concepts were used to create 27 variables with 134 connections. Feedback from focus group participants resulted in the addition of 3 variables and 9 connections.

Go to article

Zeros Of The Dedekind Zeta-Function, Mashael Alsharif Jan 2019

Zeros Of The Dedekind Zeta-Function, Mashael Alsharif

Electronic Theses and Dissertations

H. L. Montgomery proved a formula for sums over two sets of nontrivial zeros of the Riemann zeta-function. Assuming the Riemann Hypothesis, he used this formula and Fourier analysis to prove an estimate for the proportion of simple zeros of the Riemann zeta-function. We prove a generalization of his formula for the nontrivial zeros of the Dedekind zeta-function of a Galois number field, and use this formula and Fourier analysis to prove an estimate for the proportion of distinct zeros, assuming the Generalized Riemann Hypothesis.

Go to article

Addressing The Disparaity Of Outcomes For Economically Disadvantaged Students At Central Intermediate School: An Applied Research Study Related To The Implementation Of Avid Process, Steven Jarvis Hurdle Jan 2019

Addressing The Disparaity Of Outcomes For Economically Disadvantaged Students At Central Intermediate School: An Applied Research Study Related To The Implementation Of Avid Process, Steven Jarvis Hurdle

Electronic Theses and Dissertations

The purpose of this applied action research study was to close the achievement gap between economically disadvantaged (ED) students and their non-disadvantaged peers (non-Ed) through the implementation of the Advancement Via Individual Determination (AVID) system of processes. This study utilizes both quantitative and qualitative data to answer four core research questions. While the initial implementation of the plan failed to attain the targeted goal of closing the achievement, there were positive indicators for future success. ED students did appear to be effectively engaged with the AVID implementation. This engagement was validated through data about student participation in key AVID strategies, …

Go to article

Un-Earthed, William Austin Mckinney Jan 2019

Un-Earthed, William Austin Mckinney

Electronic Theses and Dissertations

With this exhibition, I strive to create sculptures that reveal beauty and act as a visual reminder of the destruction we have caused by decades of industrial negligence and greed. Using the principles and elements of design I hope to create visually stimulating objects that resembles the beauty found in the hills of Appalachia. A dialogue is fostered that influences future generations by bringing to light the reality of our past transgressions.

Go to article

Creating A Space For Steam, Felicia Brown Pollard Jan 2019

Creating A Space For Steam, Felicia Brown Pollard

Electronic Theses and Dissertations

This study investigated seven elementary teachers as they participated in professional learning communities, co-taught, and delivered STEAM instruction to students in a rural elementary school. This multiple case study analysis highlights teacher comfort in their current placement and their capacity to implement a new curriculum. The information shared in this study explores how these teachers navigated the implementation and described their experiences.

Go to article

Interpreting Vegetation And Soil Anomalies In The Guarumen Area Of Northwestern Venezuela Using Remote Sensing Applications, Tyler Edward Ricketts Jan 2019

Interpreting Vegetation And Soil Anomalies In The Guarumen Area Of Northwestern Venezuela Using Remote Sensing Applications, Tyler Edward Ricketts

Electronic Theses and Dissertations

The Guarumen area of Venezuela is a tectonically active region that is approximately 1,640 mi2 across the northern portions of the Barinas Basin and the foothills of the Mérida Andes. It is structurally influenced by the Caribbean plate to the north, the Nazca plate to the west, and the Maracaibo block against the Guyana Shield of the South American Plate. These result in an oblique boundary that gives rise to the fold-and-thrust belt of the Mérida Andes to the west, and the Caribbean Mountain system to the north, in concordance to the right-lateral shearing that is evidenced by the Boconó …

Go to article

The Effects Of Technology Based Self-Monitoring Across General Education Settings For Students With Behavior Disorders, Lane Maxcy Jan 2019

The Effects Of Technology Based Self-Monitoring Across General Education Settings For Students With Behavior Disorders, Lane Maxcy

Electronic Theses and Dissertations

This dissertation consists of three articles investigating the effects of technology-based self-monitoring to decrease off-task behaviors and increase academic engagement in students who have behavior disorders. Previous literature has examined the effects of technology-based self-monitoring in special education and alternative placements. Unfortunately, there is a lack of investigation with technology-based self-monitoring in general education settings. Together these three articles will clearly determine the effects of technology-based self-monitoring in general education settings specifically for students with behavior disorders.

Go to article

Utilizing Various Neural Network Architectures To Play A Game Developed For Human Players, Michael Blake Arender Jan 2019

Utilizing Various Neural Network Architectures To Play A Game Developed For Human Players, Michael Blake Arender

Electronic Theses and Dissertations

Neural Networks have received an explosive amount of attention and interest in recent years. Despite the fact that Neural Network algorithms having existed for many decades, it was not until recent advances in computer hardware that they saw widespread use. This is in no small part due to the success these algorithms have had in tasks ranging from image classification, voice recognition, game theory, and many other applications. Thanks to recent strides in hardware development, most importantly in the advancements in Graphics Processor Units including the capabilities of modern GPU Computing, Neural Networks are now capable of solving tasks at …

Go to article

Minimum Number Of Individuals: A Methodological Comparison Using Human Remains From Caves Branch Rockshelter In The Cayo District Of Belize, Caitlin Elizabeth Stewart Jan 2019

Minimum Number Of Individuals: A Methodological Comparison Using Human Remains From Caves Branch Rockshelter In The Cayo District Of Belize, Caitlin Elizabeth Stewart

Electronic Theses and Dissertations

The analysis of human remains in archaeological contexts is often complicated by the presence of highly fragmented and commingled remains. The standard methods used to help quantify the number of individuals and elements in these contexts are based upon the segmentation of whole bones. The methods provide standardization and are flexible enough to allow for the idiosyncratic nature of each context. However, this results in a lack of transparency, which is necessary to reanalyze the same sample or to compare “like” contexts, as the data collected will vary.

Go to article

Physical And Chemical Trace Evidence From 3d-Printed Firearms, And Use Of A Quadcopter For Targeted Sampling Of Gaseous Mercury In The Atmosphere, Oscar Beauchamp Black Jan 2019

Physical And Chemical Trace Evidence From 3d-Printed Firearms, And Use Of A Quadcopter For Targeted Sampling Of Gaseous Mercury In The Atmosphere, Oscar Beauchamp Black

Electronic Theses and Dissertations

My forensic research resulted in the first peer-reviepaper to address the forensic challenges presented by 3D-printed polymer firearms. The work involved a systematic approach to the analysis of evidence stemming from 3D-printed firearms filling a critical void in current forensic knowledge. We used DART-MS to characterize the polymer evidence left behind by 3D-printed firearms as well as an evaluation of pre-existing firearm and toolmark techniques and fingerprint analysis. We demonstrated that 3D-printed firearms leave behind characteristic polymer residue on cartridge cases bullets and the receiving surface which can be identified using DART-MS. The culmination of the work includes a database …

Go to article

The Medicine Hat Block And The Assembly Of Laurentia: New Interpretations From Single-Grain Zircon Analyses, Blake Oswell Ladouceur Jan 2019

The Medicine Hat Block And The Assembly Of Laurentia: New Interpretations From Single-Grain Zircon Analyses, Blake Oswell Ladouceur

Electronic Theses and Dissertations

The Medicine Hat Block (MHB) is one of the core cratonic elements that amalgamated in the Paleoproterozoic to form Laurentia. However the role of the MHB in the formation of Laurentia is poorly constrained due to virtually all of the MHB being concealed by Proterozoic and younger supracrustal sequences limiting availability of data. The primary sources of samples from the MHB are 1) xenoliths of variable metamorphic grade including gneisses amphibolites and meta-plutonic rocks collected from Eocene volcanic rock; and 2) similar lithologies recovered from boreholes that penetrate to the MHB basement. Previous work on samples from the MHB yielded …

Go to article

Electrochemical Studies Involving Co2 Reduction With Rhenium-Based Catalysts And For Guanosine Monophosphate Oxidation, Kayla A. Milano Jan 2019

Electrochemical Studies Involving Co2 Reduction With Rhenium-Based Catalysts And For Guanosine Monophosphate Oxidation, Kayla A. Milano

Electronic Theses and Dissertations

The following chapter of this thesis will cover the oxidation of guanine monophosphate (GMP). GMP has been linked to numerous conditions when it is oxidized or damaged. There have been two oxidation pathways suggested in association to the oxidation of GMP: EPT and MS-EPT. The ideal conditions for GMP’s oxidation is still be studied and collected. The study focuses on the acetate versus phosphate buffer, varying base concentration in phosphate buffer, and the varying concentration of ruthenium complex, a redox mediator.

Go to article

Meaning, Purpose, And Experiential Avoidance As Predictors Of Valued Behavior: An Application Of Ecological Momentary Assessment, Jeffrey Pavlacic Jan 2019

Meaning, Purpose, And Experiential Avoidance As Predictors Of Valued Behavior: An Application Of Ecological Momentary Assessment, Jeffrey Pavlacic

Electronic Theses and Dissertations

Values-based interventions in therapeutic settings direct behavior with avoidance and escape functions towards valued domains that are intrinsically reinforcing. This “progression” towards valued domains fluctuates on a daily basis, predicting less psychological stress. Contemporary conceptualizations of meaning in life delineate two primary domains: purpose (goal achievement), and significance or presence of meaning (the extent to which a person perceives themselves as “mattering”). These domains have not been simultaneously and systematically investigated in college students, a population at risk for developing maladaptive coping strategies and negative affect attributed to adjustment-related issues (e.g., binge drinking, depression, increased risk for suicidal ideation). College …

Go to article

Design And Analysis Of Efficient Parallel Bayesian Model Comparison Algorithms, Robert Wesley Henderson Jan 2019

Design And Analysis Of Efficient Parallel Bayesian Model Comparison Algorithms, Robert Wesley Henderson

Electronic Theses and Dissertations

Bayesian model comparison provides a rational and consistent method for applying logic and probability to the problem of evaluating models. Model comparison requires numerical techniques that are usually very time consuming to run. This dissertation proposes extensions to several existing numerical model comparison techniques, including nested sampling and thermodynamic integration, that incorporate parallel algorithm design to achieve significant speed-ups. Serial computer performance gains have sloin recent years, and most processing speed improvements are seen in the area of parallel architectures. This work discusses the design, theoretical analysis, and empirical analysis of these algorithms, focusing on the performance of these algorithms …

Go to article

Mefenamic Acid – Hpmc As Hg Amorphous Solid Dispersions: Dissolution Enhancement Using Hot Melt Extrusion Technology, Ashay Shukla Jan 2019

Mefenamic Acid – Hpmc As Hg Amorphous Solid Dispersions: Dissolution Enhancement Using Hot Melt Extrusion Technology, Ashay Shukla

Electronic Theses and Dissertations

Mefenamic acid, a BCS class II drug, displays high permeability and low solubility, thereby exhibiting a poor dissolution profile. Hence to improve the solubility and dissolution rate of Mefenamic acid, Hot Melt Extrusion (HME) technique was employed. The amorphous solid dispersion matrix exhibited enhanced dissolution with desired release characteristics. Hydroxypropylmethylcellulose acetate succinate (AquaSolve™ HPMC-AS HG) was used as a carrier with the poloxamer (Kolliphor P407). The drug load was varied from 20% to 40% within the blend. Drug and polymers were blended using a twin shell V-blender for 10 minutes and extruded using an 11mm twin-screw co-rotating extruder (ThermoFisher Scientific, …

Go to article

Building An Automated Q-A System Using Online Forums As Knowledge Bases, Kyle Moore Jan 2019

Building An Automated Q-A System Using Online Forums As Knowledge Bases, Kyle Moore

Electronic Theses and Dissertations

Question-Answer systems traditionally use expensive and difficult to produce structured knowledge bases. Recent systems have used unstructured natural language sources as their datasets, but most of those sources have been overly broad or difficult to extend. Online forums are a largely untapped source of information that can provide both depth and breadth when limited to a specific domain, as well as being adaptive to the introduction of new information. In this paper, I conjecture that online forums can be similarly and effectively used as an unstructured knowledge base for Question-Answer systems. I use a relatively simple summarization-based approach to analyze …

Go to article

The Synthesis Of New Donor-Sigma-Acceptor Compounds As Potential Current Rectifiers, Trey Gautier Vaughan Jan 2019

The Synthesis Of New Donor-Sigma-Acceptor Compounds As Potential Current Rectifiers, Trey Gautier Vaughan

Electronic Theses and Dissertations

The zwitterionic D-σ-A’s are characterized by having an anionic donor, a cationic acceptor, an intervening sigma-bond bridge, and an aliphatic tail. The aliphatic tail is of such length as to impart greater solubility in organic solvents since the formal charges on the donor and acceptor lead to poor solubility. Additionally, the aliphatic tail is required for Pockels-Langmuir deposition to facilitate the favorable van der Waal’s packing when combined to form dense monolayer registries. These monolayers may then be suitable for measuring the bulk electrical properties.

Go to article

Validation Of A Brief Screening Instrument For Psychopathology In Adults, Adam Sattler Jan 2019

Validation Of A Brief Screening Instrument For Psychopathology In Adults, Adam Sattler

Electronic Theses and Dissertations

Structured diagnostic interviews are generally considered to be the gold standard method of assessing mental health conditions; however clinicians rarely use such techniques in clinical practice. A major factor contributing to the infrequent use of structured interviews is the amount of time required for administration and interpretation. As such there is a need to develop assessment instruments that balance the objectivity and structure of evidence-based assessment techniques against personnel time and cost. To address this need the current study sought to validate a brief screening instrument for assessing 9 commental health conditions using a well-researched structured clinical interview to establish …

Go to article

A First-Year Teacher’S Implementation Of Short-Cycle Formative Assessment Through The Use Of A Classroom Response System And Flexible Grouping, Adrienne Irving Dumas Jan 2019

A First-Year Teacher’S Implementation Of Short-Cycle Formative Assessment Through The Use Of A Classroom Response System And Flexible Grouping, Adrienne Irving Dumas

Electronic Theses and Dissertations

As teachers we are tasked with ensuring that our students are equipped with the skills necessary to not only perform with proficiency on local state and national assessments but also to provide our students with opportunities to develop confidence and competence as learners of mathematics through meaningful challenging and worthwhile activities. As such many teachers have turned to technology and cooperative groups as staples in the classroom. The purpose of this study was to understand how one first-year teacher implemented what she was taught in her undergraduate coursework in teaching two specific units of instruction in two sections of high …

Go to article

Measures Of Music Teacher Effectiveness In Three Early Career Levels, Alicia L. Canterbury Jan 2019

Measures Of Music Teacher Effectiveness In Three Early Career Levels, Alicia L. Canterbury

Electronic Theses and Dissertations

Corroborative findings across instructional targets rehearsal frames and the summative evaluations indicated a general lack of specificity across all levels which improved somewhat during student teaching and peer teaching. Unidentified targets and nonspecific positive feedback were observed less frequently in student teaching and novice teaching. No growth was found across levels in specific positive and negative feedback. Directives were the most frequently observed teacher verbal category in selected rehearsal frames and information and demonstrations were consistently the highest ranked items across all levels in the summative evaluation. However instructional directive scores were inconsistent. Results indicate that new teachers of all …

Go to article

First Prev Next Last